Where: Vietnam (21.8° N, 106.7° E: paleocoordinates 6.3° N, 98.3° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Owenites koeneni ammonoid zone, Bac Thuy Formation, Smithian (251.3 - 247.2 Ma)
• bed-level stratigraphic resolution
Environment/lithology: open shallow subtidal; lithified limestone
Size classes: macrofossils, microfossils
Preservation: mold/impression
Collection methods: Repository: All cephalopod, gastropod, ostracod and conodont specimens are reposited at the National Museum of Nature and Science, Tsukuba. Bivalves are stored in the Faculty of Science, Kumamoto University, Kumamoto, and radiolarian specimens are stored at Tokyo Gakugei University, Koganei.
Primary reference: Y. Shigeta, T. Komatsu, T. Maekawa and H. T. Dang. 2014. Olenekian (Early Triassic) stratigraphy and fossil assemblages in northeastern Vietnam. National Museum of Nature and Science Monographs 45:1-309 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 155506: authorized by Matthew Clapham, entered by Matthew Clapham on 15.04.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Conodonta | |
Guangxidella "sp. B" Zhang and Yang 1991 conodont
Guangxidella bransoni Muller 1956 conodont
Discretella "sp. A" Orchard 2005 conodont
Discretella robustus Wang and Wang 1976 conodont | |
Cephalopoda | |
Ceratitida "genus indet. C" Hyatt 1884 ceratite | |
Preflorianites radians Chao 1959 ceratite | |
Owenites koeneni Hyatt and Smith 1905 ceratite | |
? Dieneroceras goudemandi Brayard and Bucher 2008 ceratite | |
Paranannites sinensis Chao 1959 ceratite |